Error:-
"An error occurred while attempting to establish an Applications File Server connection with the node FNDFS_<hostname>. There may be a network configuration problem, or the TNS listener on node FNDFS_<hostname> may not be running. Please contact your system administrator."
Environment:-
1) Two node database and two application (PCP)
Changes:-
1) install the latest rpm on the database and application server.
Yum update.
Issue:-
1) After reboot all database and application services started.
2) not able to see output and logs from the front end.
3) All application services started without error.
Solution:-
1) Check FNDSM listener status working fine.
2) (Active user) output and logs and generated on the backend server however not able to see output.
3) Run auto config database and application.
4) You can't get rid of FNDWRR (viewing concurrent log and out) problems, if you have a hostname with capital letters.
$EBS_APPS_DEPLOYMENT_DIR/oacore/APP-INF/node_info.txt
5) After performing the above steps the issue is on the firewall issue and finally the issue is resolved.